Philippines over the holiday

Hi there! We would like to go to the Philippines with a group of dear + fun people over the holidays. Our group (planned were 8-10) is mixed, some young vegetables (25-30) and middle age (40 to 60). Unfortunately, two friends now have work commitments and it would be a shame if their trip were to be cancelled. Common activities are desirable but in no case obligatory. Each individual has a vacation and should spend it as he or she wishes. Some of us like diving or water sports in general. But of course the nature there is also beautiful and you can make wonderful excursions. The costs are including flight and everything else at about 1,000 euros per person. The rebooking conditions I would still have to ask the airline but of course our friends bear the cost.